TurboChef C3/AB User manual

PN: TC3-0215 Rev. D January 2, 2004

C3/AB, C3/C, C3Multi, C3/CMulti

CONVECTION MICROWAVE OVEN

SERVICE AND REPAIR MANUAL

TURBOCHEF TECHNOLOGIES INC.

www.turbochef.com

10500 Metric Drive, Suite 128, Dallas, Texas 75243 USA

(800) 908 TURBO (8-8726)

.

TurboChef Technologies, Inc.

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Table of Contents

READ THIS FIRST …………………………………………………………………………… i

Important Safety Instructions ……………………………………………………………….. ii

Precautions to Avoid Possible Exposure to Excessive Microwave Energy ……………. iii

Precautions to be Observed Before and During

Servicing to Avoid Possible Exposure to Excessive Microwave Energy ………………. iv

Grounding Instructions ………………………………………………………………………. v

Power Cord Replacement …………………………………………………………………… v

RF Interference Considerations …………………………………………………………….. vi

Chapter 1 Installation Specs

Oven Description …………………………………………………………………. 1-2

Installation ………………………………………………………………………… 1-2

Oven Location

1-3

Chapter 2 Cleaning & Care

Basic Cleaning Procedures ……………………………………………………… 2-2

Chapter 3 Theory of Operation

Theory of Operation Description ………………………………………………… 3-2

Glossary of Common Operating Terms ………………………………………….. 3-3

Programming Mode 3-4

Chapter 4 Fault Codes

Fault Code Introduction ………………………………………………… 4-2

Fault Code Summary Matrix ………………………………………….. 4-3

Chapter 5 Test

Test Function Detailed Description ……………………………………………… 5-2

Passwords for Operating C3 ovens ………………………………………….. 5-3

Chapter 6 Electrical Compartment & Controls

Electrical Component Locations C3/AB 6-2

Electrical Component Locations C3/C 6-3

Electrical Component Locations C3/Multi 6-4

Electrical Component Locations C3/C Multi ………………… 6-5

Electrical Component Parts Lists 6-6

Control Panel Detail 6-8

Control System Troubleshooting 6-9

(SMT) I/O Board Troubleshooting 6-10

Chapter 7 Cook Door

Door Switches and Circuit Breakers 7-2

Door Switch Adjustment 7-4

Door Removal and Replacement ………………………………………………. 7-10

TurboChef Technologies, Inc.

Door Removal and Replacement Left Side Parts List 7-13

Door Removal and Replacement Right Side Parts List 7-16

C3/C AND C3/CMULTI Door Assy and Parts List 7-18

Chapter 7 Cook Door

C3/AB and C3MULTI Door Assy and Parts List 7-21

Chapter 8 Convection Circuit

Catalytic Converter ………………………………………………………………. 8-2

Convection Element and Thermocouples ……………………………………… 8-3

How to Turn Heaters ON & OFF …………………………………………. 8-4

Changing Heater Operating Voltage …………………………………………. 8-5

Heater Circuit Defective Messages …………………………………………. 8-6

Convection (Blower) Motor Operation ……………………. 8-9

How to Turn Blower On ……………………. 8-9

Checking Input Voltage at Motor Controller ……………………. 8-9

Blower Circuit Defective Messages ……………………. 8-10

SP-200 Blower Motor Controller Fault Codes & Troubleshooting……………….8-11

Delta Blower Motor Controller Fault Codes & Trobleshooting…………………. 8-13

Convection Motor Parts List …………… ………. 8-16

Chapter 9 Microwave Circuit

Measuring for Microwave Radiation Leakage ………………………………… 9-2

Microwave Circuit Defective Messages………………………………………… 9-3

Magnetron & Monitor Circuits…………………………………………………………9-3

Magnetron High Voltage Power Supply………………………………………….. 9-5

Magnetron Testing ……………………………………………………………….. 9-6

Magnetron Removal and Replacement ………………………………………… 9-6

Component Testing (Diode, Capacitor, Transformer)…………………………… 9-7

Transformer Specifications ……………………………………………………… 9-8

Waveguide Components Parts List 9-10

Chapter 10 (SMT)I/O BOARD & Schematics

C3/AB Schematic ………………………………………………………………….. 10-2

C3/C Schematic 10-3

C3Multi Schematic 10-4

I/O Board Layout 10-5

i

READ THIS FIRST

Before working on the TurboChef Technologies, Inc. C Series oven you must first read the safety

instructions on the following pages. The C3 series oven is a combination convection/microwave oven.

While servicing this oven, an RF meter must be used at all times to check for microwave leakage. This RF

reading must be recorded on your work invoice.

Very often poor cleaning will result in microwave leakage. Please refer to chapter 2, Cleaning & Operation,

for information on the proper cleaning procedures.

Before removing the metal skin to access the electrical components in this oven, the power must be shut

off and the oven unplugged. Wait at least one full minute before removing the oven skin so that the

magnetron circuit can self–discharge. FAILURE TO DO SO MAY RESULT IN DEATH OR SERIOUS

INJURY.

PLEASE NOTE: THIS MANUAL ONLY COVERS C3/AB OVENS PRODUCED BY THE BLODGETT

OVEN CORPORATION, C3MULTI OVENS PRODUCED TURBOCHEF, C3/C AND C3/CMULTI OVENS

PRODUCED BY TURBOCHEF TECHNOLOGIES IN CHINA.

This manual is divided into ten (10) chapters as follows:

1. INSTALLATION SPECS - This chapter includes oven specifications and the parameters for

proper installation.

2. CLEANING & OPERATION - Improper cleaning can and will affect the operation of this oven. This

chapter includes a brief description of the cleaning and operation

procedures of the oven and the procedures to edit or change a

cooking program.

3. THEORY OF OPERATION - This chapter provides a total oven overview of all major subsystems in

the oven. Additionally, it provides a list of major terms and

programming instructions.

4. FAULT CODES - This chapter includes information on all fault codes currently

programmed in the oven to display in the event of a major mulfucntion.

5. TEST - This chapter details the Test Mode, which allows the technician to

operate individual components or section of the C3 SERIES oven.

Using this feature will isolate most electrical troubleshooting

problems.

6. ELECTRICAL COMPARTMENT - This chapter identifies the electrical compartment components,

including the smt board (computer board) and a troubleshooting guide.

Use the key to help isolate electrical troubleshooting problems.

7. COOK DOOR - This chapter includes information on the Cook Door adjustment,

assembly and troubleshooting techniques.

8. CONVECTION CIRCUIT - This chapter provided information on the convection and blower motor

speed control. Removal and cleaning of the catalytic converter are

also provided.

9. MICROWAVE CIRCUIT - This chapter includes information on the microwave circuit and stirrer

motor.

10. I/O Board/Schematics - This chapter includes information on I/O board and schematics on

ovens currently in the field (latest production is only represented)

This Service and Repair manual is set up for use by qualified technicians only. If you are unfamiliar

with this oven, call TurboChef Technologies Inc.

ii

IMPORTANT SAFETY INSTRUCTIONS

WHEN USING ELECTRICAL APPLIANCES, THE FOLLOWING

BASIC SAFETY PRECAUTIONS SHOULD BE STRICTLY ADHERED TO:

WARNING!!

To reduce the risk of burns, electric shock, fire, injury to persons or exposure to excessive

microwave energy:

1. Read all instructions before using the appliance.

2. Read and follow the specific PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE

MICROWAVE ENERGY found on pages iii & iv.

3. This appliance must be grounded. Connect only to properly grounded outlet. See GROUNDING

INSTRUCTIONS found on page v.

4. Install or locate this appliance only in accordance with the provided installation instructions.

5. Some products such as whole eggs and sealed containers - for example, closed glass jars - may

explode and SHOULD NOT be heated in this oven.

6. Use this appliance only for its intended use as described in the manual. DO NOT use corrosive

chemicals or vapors in this appliance. This type of oven is specifically designed to heat, cook, or dry

food. It is NOT designed for industrial or laboratory use.

7. Children SHOULD NOT use this appliance.

8. DO NOT operate this appliance if it has a damaged cord or plug, if it is not working properly, or if it has

been damaged or dropped. See POWER SUPPLY CORD REPLACEMENT found on page v.

9. This appliance should be serviced only by qualified service personnel. Contact the nearest authorized

service facility for examination, repair or adjustment.

10. DO NOT cover or block any openings on the appliance.

11. DO NOT store this appliance outdoors. DO NOT use this product near water - for example, near a

kitchen sink, in a wet basement, or near a swimming pool.

12. DO NOT immerse cord or plug in water.

13. Keep cord away; from heated surfaces.

14. DO NOT let cord hang over edge of table or counter.

15. DO NOT use a water jet for cleaning.

16. See the Maintenance section of this manual.

17. To reduce the risk of fire in the oven cavity:

a) DO NOT overcook food. Carefully attend appliance if paper, plastic, or other combustible materials

are placed inside the oven to facilitate cooking.

b) Remove wire twist-ties from paper or plastic bag in oven.

c) If materials inside the oven should ignite, keep oven door closed, turn oven off, and disconnect the

power cord, or shut off power at the fuse or circuit breaker panel.

d) DO NOT use the cavity for storage purposes. DO NOT leave paper products, cooking utensils, or

food in the cavity when not in use.

SAVE THESE INSTRUCTIONS

iii

PRECAUTIONS TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

1. DO NOT attempt to operate this oven with the door open since open-door operation can result in

harmful exposure to microwave energy. It is important not to defeat or tamper with the safety interlocks.

2. DO NOT place any object between the oven front face and the door or allow soil or cleaner residue to

accumulate on the sealing surfaces.

3. DO NOT operate the oven if it is damaged. It is particularly important that the oven door close properly

and that there is no damage to the:

a) Door (bent).

b) Hinges and latches (broken or loosened).

c) Door seals and sealing surfaces.

4. The oven SHOULD NOT be adjusted or repaired by anyone except properly qualified service

personnel.

SAVE THESE INSTRUCTIONS

iv

PRECAUTIONS TO BE OBSERVED BEFORE

AND DURING

SERVICING TO AVOID POSSIBLE EXPOSURE

TO EXCESSIVE MICROWAVE ENERGY

1. DO NOT operate or allow the oven to be operated with the door open.

2. Make the following safety checks on all ovens to be serviced before activating the magnetron or other

microwave source, and make repairs as necessary:

a) Interlock operation.

b) Proper door closing.

c) Seal and sealing surfaces (arcing, wear, and other damage).

d) Damage to or loosening of hinges and latches.

e) Evidence of dropping or abuse.

3. Before turning on microwave power for any service test or inspection within the microwave generating

compartments, check the magnetron, wave guide, or transmission line, and cavity for proper alignment,

integrity, and connection.

4. If the oven is operative prior to servicing, a microwave emission check should be performed prior to

servicing the oven. Refer to page 6-2 of this manual for microwave leakage testing procedure.

5. Any defective or mis–aligned components in the interlock, monitor, door seal, and microwave

generation and transmission systems shall be repaired, replaced, or adjusted by procedures described

in this manual before the oven is released to the owner.

6. A microwave leakage check to verify compliance with the Federal Performance Standard MUST BE

performed on each oven prior to release to the owner. Refer to page 6-2 of this manual for microwave

leakage testing procedure.

SAVE THESE INSTRUCTIONS

v

GROUNDING INSTRUCTIONS

This appliance MUST BE grounded. In the event of an electrical short circuit, grounding reduces the risk of

electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord

having a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly

installed and grounded.

WARNING!!

Improper use of the grounding can result in a risk of electric shock.

Consult a qualified electrician or serviceman if the grounding instructions are not completely understood, or

if doubt exists as to whether the appliance is properly grounded.

DO NOT use an extension cord. If the power supply cord is too short, have a qualified electrician or

serviceman install an outlet near the appliance.

POWER SUPPLY CORD REPLACEMENT

If the power supply cord is damaged, it MUST BE replaced by the manufacturer or its service agent or a

similarly qualified person in order to avoid a hazard.

General Note about Construction

Please be advised that the TurboChef C3 series ovens are manufactured in various locations, as such the

C3/C and C3/Cmulit are constructed using the Metric System. Therefore, it is very important to note the

model number of the unit you are servicing to ensure you get the correct Metric component. Care has

been given in this manual to list the different part numbers for the Metric and Imperial (C3/AB and C3Multi)

ovens. In addition, please note that most hardware on the C3/C and C3/Cmulti oven is metric unless

otherwise specified.

SAVE THESE INSTRUCTIONS

vi

RF INTERFERENCE CONSIDERATIONS

This oven generates radio frequency signals. This device has been tested and determined to be in

compliance with applicable part of FCC part 18 requirements and to the protection requirements of Council

Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic

compatibility at the time of manufacture. However, some other equipment may exhibit sensitivity to signals

below these limits resulting in interference with that equipment.

If your equipment experiences interference, the following steps should be considered:

1. Increase the physical separation between this oven and the sensitive equipment.

2. If the sensitive device can be grounded, do so following accepted grounding practices.

3. If battery powered microphones are being affected, insure that the batteries are fully charged.

4. Keep sensitive equipment on electrically separate circuits, if possible.

5. DO NOT route intercom wires, microphone wires, or speaker cables near oven.

SAVE THESE INSTRUCTIONS

CHAPTER 1

INSTALLATION SPECS

TurboChef Technologies, Inc. C series

1 - 2

OVEN DESCRIPTION

SPECIFICATIONS C3/AB, C3MULTI, C3/C, AND C3/CMULTI

Dimensions (single unit) 29” W x 25.5” H x 29.5” D (73.66 cm x 64.77 cm x 74.93 cm)

Dimensions (double stacked units) 29” W x 43” H x 29.5” D (73.66 cm x 109.22 cm x 74.93 cm)

Maximum Input 7.2 kW

Power Supply

US (1 φ

) All Models

208 VAC, 60Hz, 1 φ, 35 amp, 3 wire including ground

240 VAC, 60 Hz, 1φ, 30 amp, 3 wire including ground

Europe(1φ

) All Models

230-240 VAC, 50 Hz, 1φ, 30 amp, 3 wire including ground

US (3φ) C3Multi and C3/Cmulti

208 VAC, 60Hz, 3 φ, Delta, 30 amp, 4 wire including ground

240 VAC, 60 Hz, 3φ, Delta, 22 amp, 4 wire including ground

Europe (3φ) C3Multi and C3/Cmulti

380-415 VAC, 50 HZ, 3φ, WYE, 15 Amp, 5 wire including ground

230-240 VAC, 50 HZ, 3φ, Delta, 22 Amp, 4 wire including ground

Microwave Frequency 2.45 GHz

Connections including ground The unit is supplied with a 6’ power cord that includes:

US (1 φ) NEMA 6-50P

Europe(1φ

φφ

φ) 32A IEC 60309 plug

US (3 φ) NEMA 15-50P

Europe(3φ

φφ

φ) 32A IEC 5 Pin plug

The outlet box, receptacle, and wall plate ar

e to be furnished by

the installing contractor.

Maximum Power Usage

Convection Oven

Microwave Oven

5.2 kW

2.0 kW

TABLE 1 - 1 Oven Specifications

INSTALLATION

The TurboChef Technologies, Inc. oven is

manufactured to comply with applicable CE, ETL,

FDA, and FCC requirements. In addition, the unit

is ETL classified to NSF 4. Note: Some

European models may or may not be certified

under US FDA and/or ETL regulations. All

equipment is designed and certified for safe

operation when installed in accordance with local

and/or national codes. Many local codes exist,

and it is the responsibility of the owner and

installer to comply with these codes. In addition,

if the oven is not UL or ETL listed it MAY NOT BE

USED or SOLD in the U.S.A or any of its

territories.

In no event shall the manufacturer assume any

liability for damages or injuries resulting from

installations which are not in compliance with the

instructions and codes listed above.

WARNING!!

DEATH, INJURY, AND EQUIPMENT DAMAGE

could result from improper installation of this

oven or installation of an oven which has

been damaged during shipment or storage.

Either of these conditions could void the

equipment warranty.

DO NOT INSTALL an oven suspected of

damage.

INSTALL this oven according to the policies

and procedures outlined in this manual.

Installation Specs

1- 3

OVEN LOCATION

The well planned and proper placement of your

oven will result in long term operator convenience

and satisfactory performance.

Be sure to place the oven in an area which is

accessible for proper operation and servicing.

The countertop or work surface must be able to

support the weight of 250 pounds. The

manufacturer shall not assume liability for

damage or injury resulting from improper

installation of equipment including temporary or

unstable work stations or countertops.

There must be 2” (5.08 cm) between the top of

the unit and any shelf or other surface.

The oven must be installed level front to back

and side to side. The oven legs may be bolted to

the counter top if desired.

Countertop surface must be at least 30 inches

deep. Operator is responsible for proper

placement on the countertop. TurboChef will not

be responsible should an oven fall off a

countertop due to improper placement or use by

the customer. Oven placement shall be readily

accessible by a service agent. Additional charges

ma be incurred by the customer should product

placement mandate required service labor

charges due to accessibility to the unit.

CHAPTER 2

CLEANING & OPERATING

TurboChef Technologies, Inc. C Series

2-2

BASIC CLEANING PROCEDURES

PROBLEMS ASSOCIATED WITH IMPROPER

CLEANING

The oven may not be operating correctly because

it is not being cleaned properly. If the door is

leaking microwaves, erratic operation of the

display and other electrical components can

occur. Also food deposits left in the oven will turn

into black carbon from the high heat. Carbon can

cause arcing inside the cooking area and can

reflect energy back to the magnetron.

If a customer tells you they are experiencing

cooking performance problems, carefully inspect

the cooking platter and waveguide cap for chips.

If the platter or waveguide cap are chipped and

soaked in water, they will absorb the water. The

water will then be heated instead of the food

product. The chipped part must be replaced.

DAILY CLEANING

1. Carefully remove the ceramic cooking platter

and wave–guide cap. Spray both pieces only

with TurboCare®

®®

® Oven Cleaner and set

aside to allow the cleaner to penetrate. DO

NOT soak the Ceramic Cook Platter or

Waveguide Cap in water.

2. Clean the ceramic cooking platter, and wave

guide cap using brushes and scrub pads.

Rinse to remove all cleaner and debris.

Inspect for damage and replace as required.

3. Reinstall the clean wave–guide cap into

the oven. This will protect the wave–guide

seal while the cook chamber is cleaned.

4. To clean the interior of the oven, use a 3”x5”

green scrub pad. Use only TurboCare®

®®

®

Oven Cleaner on tough spots. DO NOT

wash out the interior cooking area. The

waveguide quartz seal is not a water tight

seal. Wipe out the oven with a damp rag. If

the door area needs cleaning, be careful not

to damage the small rubber gasket around

the door shunt area.

5. Remove the lower access panel and grease

collection pan. Empty, clean and reinstall the

pan.

6. Verify the louvers on the front and side of the

oven are clean of lint and unobstructed.

MONTHLY CLEANING

Remove and clean the exhaust cover from the

back of the oven.

Cook Platter

Waveguide

Cap

Grease

Tray

Lower Access

Panel

Exhaust

Cover

FIGURE 2 - 1 Cleaning

CHAPTER 3

THEORY OF OPERATION

TurboChef Technologies, Inc. C Series

3-2

INTRODUCTION

The TurboChef C3/C oven utilizes two independent heat transfer mechanisms in order to rapidly cook food.

The systems are as follows: Convection and Microwave energy. By combining these mechanisms and

with our ability to control each mechanism independently, we are able to reduce the cook time of most

foods by 70%-90%.

For the purpose of this manual we will identify each independent heat transfer mechanism individually. For

instance, if an oven is experiencing difficulties browning the food, you know to focus on the Convection

Circuit not the Microwave System. If an oven is browning the food but not heating the food, you will know to

focus on the Microwave System.

The following block diagram represents the oven’s different systems and their critical components. If you

are experiencing problems with any of the components listed below, please turn to the appropriate section.

SECTION 8

Convection System

• Convection.

Heater

• Blower

Controller

• Convection

Blower

• Catalytic

Converter

SECTION 9

Microwave System

• Magnetron

• HV Transformer

• Filament Trans.

•

HV Capacitor

• Mechanical

Microwave

Components

SECTION 6

Control System

• I/O Board

• Keypad

• Display

• Mech. Relays

• SS Relays

Cooking

Process

Food Products

Profiles

Theory of Operation

3-3

GLOSSARY OF COMMON

OPERATING TERMS

Display

- Primary interface to relay

messages to the operator.

Keypad

- Primary interface for the

operator to control the oven.

Cook Chamber

- Cavity in which the

food products are cooked.

PRODUCT RECIPES

Recipe

- The food product recipe

programming consists of total time,

percent of total time per event,

percentage of hot air flow (AIR) required

and microwave (MW) level required.

Cook Cycle

- Total time of operation for

a recipe.

Cook Event

– Segment of a recipe, up

to 6 events can be used for each recipe.

Duration

- Time, in percent of total time

of a single cook event.

Air

- Percent of convection air flow

during a cook event.

MW

- Percent of microwave used during

a cook event.

Cook Temperature Set Point

-

Temperature should be a constant

parameter. The same cook temperature

should be used by all cook recipes.

MODES

Mode

– The software environment which

allows certain operations to occur. There

are several modes, STANDBY, COOK,

WARM UP and COOL DOWN in which

the oven can operate.

Standby Mode

- The standby mode is

similar to oven off. In standby there is no

power to the oven. There is power to the

control, however, the oven will not

operate in standby mode.

Cook Mode

- Mode used to perform the

normal oven operations, such as,

monitor the key pad for requests to cook

or change mode, and maintain the oven

at the cook temperature set point.

Warm–Up Mode

- Mode to bring the

oven up to the cook temperature set

point.

Cool–Down Mode

- Turns off all oven

components except the cooling fan and

circulation blower.

TurboChef Technologies, Inc. C Series

3-4

Programing

Edit Mode

Edit mode enables the operator to alter

Recipes and the Cook Chamber

Temperature (CC). To Access Edit Mode,

press the “Up” and “Down” Arrows Keys on

the keypad simultaneously. When

prompted, enter the Access Code “9” and

then press “Enter”.

Changing the Cook Chamber

Temperature

The first screen in Edit Mode allows you to

change the Cook Chamber Temperature

(CC) by pressing the “Up” and “Down” Arrow

Keys. The operator may adjust the

temperature between 350

o

F and 525

o

F in

25

o

F increments. Once you have selected

the desired temperature, press the “Enter”

Key to set CC.

Altering a Recipe

The C3 oven control has 64 unique Recipes

available for the operator. The Display will

show 1 page of 8 Recipe Groups. Each

Recipe Group contains 8 Subgroups or

Recipes. See Figures 3-1 and 3-2.

To alter a Recipe, enter Edit Mode as

described above. After you have entered

the Access Code and set CC, the screen will

display the 1

st

set of 8 Recipe Groups.

Now select the Recipe Group that contains

the individual Recipe you wish to alter.

Next, select which Recipe you wish to alter

by pressing the Soft-Key corresponding to

the Recipe Item. See Figure 3-2.

Figure 3

-

2: Edit Groups

Group A

1

st

ITEM 5

TH

ITEM

2

nd

ITEM 6

TH

ITEM

3

RD

ITEM 7

TH

ITEM

4

TH

ITEM

8

TH

ITEM

Figure 3

-

1: Edit Groups

EDIT GROUPS

GROUP A GROUP E

GROUP B GROUP F

GROUP C GROUP G

GROUP D GROUP G

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